Used in legal or formal contexts to refer to the basis for an accusation or suspicion. Often appears in set phrases like かどで逮捕される (arrested on suspicion of ...).
He was arrested on suspicion of theft.
He was arrested on suspicion of fraud.
He was dismissed on those grounds.
He was indicted on the charge of assault.
疑い is the everyday, plain word for 'suspicion,' whereas 廉 is a stiff, legalistic term that appears mainly in set phrases like かどで逮捕される.
角 (かど) means 'corner' or 'edge' and is written with a different kanji from 廉 (かど), which means the 'grounds' for an accusation; the two share only pronunciation.
each point; each item; every detail
Usually written in kana; the kanji 廉 is rare and may not be recognized by many readers.
Kanji form is uncommon; learners should use the kana spelling.
The historical derivation is uncertain; the kanji 廉 is conventionally associated with the meaning of 'grounds' or 'reason' in legal contexts.